C solution for week 96/part 1

2 files changed, 67 insertions, 0 deletions

diff --git a/challenge-096/abigail/README.md b/challenge-096/abigail/README.md
index c45d495eb6..ee7bed56c2 100644
--- a/challenge-096/abigail/README.md
+++ b/challenge-096/abigail/README.md
@@ -20,6 +20,7 @@ Output: "family same the of part are Raku and Perl"
 ~~~~
 
 ### Solutions
+* [C](c/ch-1.c)
 * [AWK](awk/ch-1.awk)
 * [Node.js](node/ch-1.js)
 * [Perl](perl/ch-1.pl)
diff --git a/challenge-096/abigail/c/ch-1.c b/challenge-096/abigail/c/ch-1.c
new file mode 100644
index 0000000000..22ebafd404
--- /dev/null
+++ b/challenge-096/abigail/c/ch-1.c
@@ -0,0 +1,66 @@
+# include <stdlib.h>
+# include <stdio.h>
+# include <string.h>
+# include <ctype.h>
+
+int main (void) {
+    char *  line    = NULL;
+    size_t  len     = 0;
+    size_t  strlen;
+
+    while ((strlen = getline (&line, &len, stdin)) != -1) {
+        char * line_ptr = line;
+        size_t end = strlen;
+        size_t begin;
+        size_t output = 0;
+        while (end > 0) {
+            /*
+             * Skip tailing whitespace
+             */
+            while (end > 0 && isspace (line [end - 1])) {
+                end --;
+            }
+
+            /*
+             * 'end' now just after the end of a word, or
+             * at the beginning of the string; if the latter,
+             * there is nothing left to print.
+             */
+
+            if (end <= 0) {
+                break;
+            }
+
+            /*
+             * Find the beginning of a word
+             */
+            begin = end - 1;
+            while (begin > 0 && !isspace (line [begin - 1])) {
+                begin --;
+            }
+
+            /*
+             * Extract the word out of the string: allocate memory,
+             * and copy the right part of the input.
+             */
+            char * word;
+            if ((word = malloc ((end - begin + 1) * sizeof (char))) == NULL) {
+                fprintf (stderr, "Out of memory\n");
+                exit (1);
+            }
+            stpncpy (word, line + begin, end - begin);
+
+            /*
+             * Print the string, prepended (except the first printed word)
+             * by a space.
+             */
+            printf ("%s%s", output ++ ? " " : "", word);
+
+            end = begin;
+        }
+        printf ("\n");
+    }
+    free (line);
+
+    return (0);
+}